Got help from a friendly dealer - thanks to him. I love my Meridian gear - but they have become a weird company, why all these blockers to make simple installs of firmware?

818v3, Trinnov Altitude 32-16, 271, G68ADV, UHD722, DSP8000(U)SE, DSP5200 (SL), DSP5200HC (SL), DSP3200, 4xDSP320.2, G98, MS200, Prime HA, Ex2, 561, 598DH, 504, Roon Lifetime, Roon Rock, 218, Oppo 103, Panasonic UHD9000